Question

In how many years will a certain sum becomes 5 times itself at 20% per annum simple interest

Answer 1

Let the sum be Rs x .
So, Amount = Rs 5x .
Let after t years, the sum will become 5 times of itself .
Rate = 20 % p.a.
So, SI = Rs 5x- x = Rs 4x .
Required time = 100 × SI / P × R = (100×4x/ x× 20 )yr
= 5/4 years .

Answer 2

Answer:

5/4 years

Step-by-step explanation:

Let the sum be Rs x .

So, Amount = Rs 5x .

Let after t years, the sum will become 5 times of itself .

Rate = 20 % p.a.

So, SI = Rs 5x- x = Rs 4x .

Required time = 100 × SI / P × R = (100 × 4x/ x × 20 ) yr

                        = 5/4 years .

Pls mark my answer as brainlist

Pls follow me